Alois ztnxb



Patented Sept. 13, 1927.

UNITED STATES PATENT oEF cE.

ALOIS ZINKE, OI GRAZ, AUSTRIA, ASSIGNOR, BY, HESNE ASSIGNIENTS, '10I'ELICI i nurse, or canon, ITALY.

V PROCESS FOR MANUFACTURING DINITBO PEBYLENE QUIN'ONE.

No Drawing. Application fled June 15, 1923, Serial No. 645,708, and inAustria June 20, 1922.

It is known that by nitrating perylene The position of the two NO groupscould quinone mononitro perylene qulnone is obtained. I have discoveredthat by increasing the duration of the reaction the nitra- 5 tionfurther proceeds and dinitro perylene uinone is formed. According to theinvent1on mononitro perylene quinone already formed is nitrated oncemore, but preferably perylene. quinone is used as the prime material andthe, nitration is caused to continue beyond the formation of mononitroperylene quinone up to the formation of dinitro perylene quinones.

Ewwmple.0ne part by weight of 3.10 perylene quinone is heated'to bollinwith a mixture of 250 parts by weight 0 glacial acetic acid and 80 partsby weight of concentrated nitric acid (density 1.4). After boiling for ashort perlod the separation of mononitro perylene quinone begins whichon further boillng becomes darker in colour. After boiling for half anhour the reaction is finished.

The dinitro derivatives dissolve in concentrated sulphuric acid withviolet colour. They are insoluble in alcohol, ether, acetone andkerosene and soluble in boiling nitrobenzol, and can be purified by ortallizing froin nitrobenzol and are then 0 tained in reddish brownneedles. The output is 90 to 95% of the theory.

The vat is brownish voilet, cotton is dyed violet. The dinitro lenequinone can be directly used as a rye or it can be used as ll grimematerial for t e manufacture of other The followin diagram shows thestructural formula 0 the dinitro perylene qumone with the numbering ofthe positions.

' name to this specification.

not be fully ascertained up to now glacial acetic acid and concentratednitric acid of a density of 1.4 whereby first mononitro perylene quinoneis formed and in then continuing boilin whereby dinitro perylene quinoneis forme *3. A process for manufacturing dinitro erylene quinoneconsisting in boihn peryene quinone with a mixture of glacia acetic acidand concentrated nitric acid of a density of 1.4 during a period of timenot exceeding one hour.

4. As a new article of manufacture, dinitroperylene 3.10 quinone.

In testimony whereof I have signed my ALOIS ZINKE.

